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Seismic Fragility Evaluation of Main Steam Piping of Isolated APR1400 NPP Considering the Actual Failure Mode

Author

Listed:
  • Bub-Gyu Jeon

    (Seismic Research and Test Center, Pusan National University, Yangsan-si 50612, Korea)

  • Sung-Wan Kim

    (Seismic Research and Test Center, Pusan National University, Yangsan-si 50612, Korea)

  • Da-Woon Yun

    (Seismic Research and Test Center, Pusan National University, Yangsan-si 50612, Korea)

  • Daegi Hahm

    (Advanced Structures and Seismic Safety Research Division, Korea Atomic Energy Research Institute, Daejeon 37224, Korea)

  • Seunghyun Eem

    (Department of Convergence & Fusion System Engineering, Kyungpook National University, Sangju 41566, Korea)

Abstract

An isolation system installed in a nuclear power plant (NPP) could increase seismic safety during seismic events. On the other hand, a more significant relative displacement may occur due to the isolation system. The seismic risk could be increased in the case of an interface piping system that connects isolated and nonisolated structures. Therefore, it is necessary to consider the piping systems when evaluating the safety of isolated-NPPs. This study performed seismic fragility analysis with isolated APR1400 nuclear power plants with the main steam piping. The main steam piping is the interface pipe connecting the isolated auxiliary building and the turbine building. The failure mode for seismic fragility analysis was defined as cracks caused by leakage. The experimental and numerical analysis results quantified the leak-through crack point as a damage index. The seismic fragility curves are suggested based on peak ground acceleration and the relative displacement between the isolated and nonisolated buildings.

Suggested Citation

  • Bub-Gyu Jeon & Sung-Wan Kim & Da-Woon Yun & Daegi Hahm & Seunghyun Eem, 2022. "Seismic Fragility Evaluation of Main Steam Piping of Isolated APR1400 NPP Considering the Actual Failure Mode," Sustainability, MDPI, vol. 14(14), pages 1-15, July.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:14:p:8315-:d:857634
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    Cited by:

    1. Bub-Gyu Jeon & Sung-Wan Kim & Da-Woon Yun & Bu-Seog Ju & Ho-Young Son, 2022. "An Experimental Study on Seismic Performance Evaluation of Multi-Ply Bellows Type Expansion Joint for Piping Systems," Sustainability, MDPI, vol. 14(22), pages 1-15, November.

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